Abstract: the working principle of the steam flow meter
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Working principle of the steam flowmeter on the domestic market at present the use of steam flowmeter has 2 or more, a steam flowmeter is electronic, and there's a mechanical, mechanical products are eliminated products, the precision is poor, low temperature resistant, let me explain, for everyone.
More flow meter manufacturers choose model price quote you are welcome to inquire, here is the working principle of the steam flow meter scale article details.
Working principle of the steam flowmeter on the domestic market at present the use of steam flowmeter has 2 or more, a steam flowmeter is electronic, and there's a mechanical, mechanical products are eliminated products, the precision is poor, low temperature resistant, let me explain for everybody, AK -
LUGB working principle of intelligent steam flowmeter, the streamlined vortex in the fluid body (
, from spiral body takes place on both sides of the alternately to produce two columns with the rules of the vortex, the vortex is called karman vortex, as shown in figure (
In the vortex formation downstream alternating regular vortex column.
Sets the frequency of vortex to f, measured medium to flow the average speed of V, incident flow of the vortex occurred body width is d, according to the principle of the karman vortex street, with the following formula: f = StV/d formula (
Type: the body side f - taking place karman vortex frequency HZ St - strouhal number (
Fluid average flow velocity (V -
Vortex occurrence body width (d -
Thus, by measuring the karman vortex street can calculate the instantaneous flow separation frequency.
Among them, the stern ROM (Hal
Is a dimensionless unknown figure (
Indicates that the strouhal number (
With the Reynolds number (
The relationship between.
The curve in the table St = 0.
17 straight part of the release of the vortex frequency is proportional to the velocity of flow, is the degree of vortex flow sensor measurement range.
As long as to detect the frequency f tube fluid velocity, are obtained by to calculate volume flow velocity V.
Measured by the number of pulses and the ratio of the volume flow rate, known as the instrument constants (
, as shown in equation (
K = 3600 f / Q (
Type: K = instrument constants (
F = pulse number Q = volume flow (
So it seems the working principle of steam flowmeter is known to all, in the process of purchasing in the future will be better able to help you selection, AK - steam flowmeter
LUGB this, the quality excellent, high precision.
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Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.
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